Sensirion SCD40-D-R1 CO₂ Gas Detection Sensor, I²C Output, Integrated Temp & Humidity, 2.4~5.5 VDC, SCD4x Series
The Sensirion SCD40-D-R1 is a compact, reflow-solderable CO₂ sensor module featuring Sensirion’s photoacoustic NDIR (PASens®) technology. It integrates digital I²C communication and includes on-chip temperature and humidity sensors, making it ideal for integration with microcontrollers like Arduino, Raspberry Pi, ESP32, and STM32 for advanced indoor air quality monitoring.
Features
- Photoacoustic NDIR (PASens®) technology for accurate CO₂ measurement up to 40,000 ppm.
- Ultra-compact SMD package (10.1 × 10.1 × 6.5 mm) suitable for reflow soldering.
- Integrated CMOSens® technology for simultaneous temperature and humidity sensing.
- Digital I²C interface for straightforward connection to microcontrollers and SBCs.
- Low-power operation with single-shot and periodic measurement modes for energy-efficient designs.
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The SCD40-D-R1 leverages Sensirion’s patented photoacoustic sensing (PASens®) principle, which offers high stability and long-term reliability for CO₂ detection without the need for frequent recalibration. Its all-in-one design incorporates a microcontroller, memory, and calibrated sensors for temperature and humidity, providing a complete environmental sensing solution.
Designed for space-constrained applications, this sensor operates from a 2.4V to 5.5V supply and features advanced power management, including an automatic self-calibration (ASC) algorithm. It is engineered for long-term deployment in HVAC systems, demand-controlled ventilation, smart building controls, and portable air quality monitors, complying with standards like WELL, ASHRAE, and RESET.
Additional Information
| Weight | 0.005 kg |
|---|---|
| Dimensions | 1.01 × 1.01 × 0.65 cm |
